What is the right amount of insulation to put on the exterior of a home?

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Should you put insulation on the outside of a cinder block wall in a desert?

Michael Apodaca Published: March 9, 2020, 3:10 p.m.Last updated: Sept. 9, 2020, 4:36 p.m.

I have a home about 3000 sq.  the top is about 1700 and the rest in the basement, being a cinderblock home with a 2 foot over hang. I studed my inner wall, I put R13 fiberglass and sheet rock, then on the outside I tared the out side and filled most  of them with cement a few have insolation very few.

Shoud I put styrofoam board then tar board chicken wire then stuco then paint with elastromeric/ sand mix, all to keep out heat. Styrofoam or no Styrofoam is the question. is it worth the cost or am I going over board?

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